NVIDIA GeForce GTX 660 vs AMD Radeon HD 6870
NVIDIA GeForce GTX 660
$230
AMD Radeon HD 6870
$239
|
960 Shaders
2GB GDDR5
1084MHz
|
1120 Shaders
2GB GDDR5
900MHz
|
|
Peak Performance
2.08 TOPS
INT32
|
Peak Performance
2.02 TFLOPS
FP32
|
|
FP32
2.08 TFLOPS
|
FP32
2.02 TFLOPS
|
|
-
-
|
-
-
|
|
Form Factor
PCIe Card
2.0-Slots
|
Form Factor
PCIe Card
2.0-Slots
|
|
TDP
140W
|
TDP
151W
|
|
Power Connectors
1x 6-Pin
-
-
-
|
Power Connectors
2x 6-Pin
-
-
-
|
|
GB6 Metal N/A
0%
|
|
|
GB6 Vulkan N/A
0%
|
|
GB5 OpenCL N/A
0%
|
GB5 OpenCL N/A
0%
|
|
GB5 CUDA N/A
0%
|
GB5 CUDA N/A
0%
|
|
GB5 Metal N/A
0%
|
GB5 Metal N/A
0%
|
|
GB5 Vulkan N/A
0%
|
GB5 Vulkan N/A
0%
|
|
OCT 2020.1 N/A
0%
|
OCT 2020.1 N/A
0%
|
|
OCT Metal N/A
0%
|
OCT Metal N/A
0%
|
|
Manufacturer
NVIDIA
|
Manufacturer
AMD
|
|
Chip Designer
NVIDIA
|
Chip Designer
AMD
|
|
Architecture
Kepler
|
Architecture
TeraScale 2
|
|
Family
GeForce 600
|
Family
Radeon HD 6000
|
|
Codename
NVE6
GK106
Variant
GK106-400-A1
|
Codename
Barts
RV940
Variant
Barts XT
|
|
Market Segment
Desktop
|
Market Segment
Desktop
|
|
Release Date
9/13/2012
|
Release Date
10/22/2010
|
|
Foundry
TSMC
-
|
Foundry
TSMC
-
|
|
Fabrication Node
28nm
-
|
Fabrication Node
40nm
-
|
|
Die Size
221 mm²
-
|
Die Size
255 mm²
-
|
|
Transistor Count
2.5 Billion
-
|
Transistor Count
1.7 Billion
-
|
|
Transistor Density
11.49M/mm²
-
|
Transistor Density
6.67M/mm²
-
|
|
Form
PCIe Card
|
Form
PCIe Card
|
|
Shading Units
960 Shaders
-
|
Shading Units
1120 Shaders
-
|
|
Texture Mapping Units
80 TMUs
|
Texture Mapping Units
56 TMUs
|
|
Render Output Units
24 ROPs
|
Render Output Units
32 ROPs
|
|
-
-
|
-
-
|
|
-
-
|
-
-
|
|
Streaming Multiprocessors
5 SMs
|
-
-
|
|
-
-
|
Compute Units
14 CUs
|
|
-
-
|
-
-
|
|
-
-
|
-
-
|
|
-
-
980MHz Base
1084MHz
|
-
-
-
900MHz
|
|
Peak Performance
2.08 TOPS
INT32
|
Peak Performance
2.02 TFLOPS
FP32
|
|
-
-
-
|
-
-
-
|
|
-
-
-
-
-
-
|
-
-
-
-
-
-
|
|
-
-
-
-
-
-
|
-
-
-
-
-
-
|
|
FP32
2.08 TFLOPS
-
-
|
FP32
2.02 TFLOPS
-
-
|
|
FP64
0.09 TFLOPS
-
|
-
-
-
|
|
-
-
-
-
|
-
-
-
-
|
|
-
-
-
|
-
-
-
|
|
-
-
-
|
-
-
-
|
|
-
-
-
-
|
-
-
-
-
|
|
INT32
2.08 TOPS
|
-
-
|
|
-
-
|
-
-
|
|
Pixel Fillrate
26.016 GPixel/s
|
Pixel Fillrate
28.8 GPixel/s
|
|
-
-
|
-
-
|
|
Texture Fillrate
86.72 GTexel/s
|
Texture Fillrate
50.4 GTexel/s
|
|
-
-
|
-
-
|
|
L1
48KB/SM Tex
16KB/SM
-
-
|
L1
-
-
8KB/CU
-
|
|
L2
512KB Shared
|
L2
512KB Shared
|
|
-
-
-
|
-
-
-
|
|
2GB
GDDR5
-
|
2GB
GDDR5
-
|
|
Bus Width
192Bit
|
Bus Width
256Bit
|
|
Clock
1502MHz
Transfer Rate
6GT/s
Bandwidth
144.2GB/s
|
Clock
1050MHz
Transfer Rate
4.2GT/s
Bandwidth
134.4GB/s
|
|
-
-
-
-
-
-
-
-
-
|
-
-
-
-
-
-
-
-
-
|
|
TDP
140W
|
TDP
151W
|
|
-
-
|
-
-
|
|
-
-
-
-
-
-
-
-
1x DVI-I Dual-Link
-
1x DVI-D Dual-Link
-
-
-
-
-
-
-
-
-
-
-
1x DisplayPort 1.2
-
-
-
-
-
-
-
-
-
-
-
1x HDMI 1.4
-
-
-
-
|
-
-
-
-
-
-
-
-
2x DVI-I Dual-Link
-
-
-
-
-
2x mini-DisplayPort 1.1
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1x HDMI 1.3
-
-
-
-
-
|
|
Max Resolution
4096x2304
|
Max Resolution
2560x1600
|
|
Max Resolution Refresh Rate
60Hz
|
Max Resolution Refresh Rate
60Hz
|
|
Variable Refresh Rate
G-Sync
FreeSync
-
|
Variable Refresh Rate
-
-
-
|
|
Display Stream Compression (DSC)
Not Supported
|
Display Stream Compression (DSC)
Not Supported
|
|
Multi Monitor Support
3
|
Multi Monitor Support
2
|
|
-
-
|
-
-
|
|
Model
NVENC 1
|
No Encoders
-
|
|
Codec
-
-
-
-
-
-
-
-
AVC (H.264)
-
-
-
-
-
|
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
|
|
Model
NVDEC 1
|
Model
UVD 3.0
|
|
Codec
MPEG-1
MPEG-2
MPEG-4
-
VC-1
-
-
-
AVC (H.264)
-
-
-
-
-
|
Codec
MPEG-1
MPEG-2
MPEG-4
-
VC-1
-
-
-
AVC (H.264)
-
-
-
-
-
|
|
Direct X
12
Direct 3D
11_0
|
Direct X
11
Direct 3D
11_0
|
|
OpenGL
4.6
OpenCL
3.0
Vulkan
1.2
|
OpenGL
4.5
OpenCL
1.2
-
-
|
|
Shader Model
6.5
CUDA
3.0
-
-
PureVideo HD
VP5
VDPAU
Feature Set D
|
Shader Model
5.0
-
-
GFX
4
-
-
-
-
|
|
-
-
-
1x Fan
|
-
-
-
1x Fan
|
|
Power Connectors
-
-
1x 6-Pin
-
-
-
-
|
Power Connectors
-
-
2x 6-Pin
-
-
-
-
|
|
Slots Required
2.0
PCIe Version
3.0
PCIe Lanes
16
|
Slots Required
2.0
PCIe Version
2.1
PCIe Lanes
16
|
|
Multi GPU Support
Supported
Type
2-way SLI
|
Multi GPU Support
Supported
Type
4-way CrossFireX
|
|
Height
111 mm (4.37 in)
Width
241 mm (9.49 in)
Depth
38 mm (1.5 in)
|
Height
111 mm (4.37 in)
Width
247 mm (9.72 in)
Depth
36 mm (1.42 in)
|
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